ProfileJavaPanel.java

package net.minecraft.launcher.ui.popups.profile;

import net.minecraft.launcher.OperatingSystem;
import net.minecraft.launcher.locale.LocaleHelper;

import javax.swing.*;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import java.awt.*;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.util.ResourceBundle;

public class ProfileJavaPanel extends JPanel {
    private ResourceBundle resourceBundle = LocaleHelper.getMessages();
    private final ProfileEditorPopup editor;
    private final JCheckBox javaPathCustom = new JCheckBox(resourceBundle.getString("executable"));
    private final JTextField javaPathField = new JTextField();
    private final JCheckBox javaArgsCustom = new JCheckBox(resourceBundle.getString("jvm.arguments"));
    private final JTextField javaArgsField = new JTextField();

    public ProfileJavaPanel(ProfileEditorPopup editor) {
        this.editor = editor;

        setLayout(new GridBagLayout());
        setBorder(BorderFactory.createTitledBorder(resourceBundle.getString("java.settings.advanced")));

        createInterface();
        fillDefaultValues();
        addEventHandlers();
    }

    protected void createInterface() {
        GridBagConstraints constraints = new GridBagConstraints();
        constraints.insets = new Insets(2, 2, 2, 2);
        constraints.anchor = 17;

        constraints.gridy = 0;

        add(this.javaPathCustom, constraints);
        constraints.fill = 2;
        constraints.weightx = 1.0D;
        add(this.javaPathField, constraints);
        constraints.weightx = 0.0D;
        constraints.fill = 0;

        constraints.gridy += 1;

        add(this.javaArgsCustom, constraints);
        constraints.fill = 2;
        constraints.weightx = 1.0D;
        add(this.javaArgsField, constraints);
        constraints.weightx = 0.0D;
        constraints.fill = 0;

        constraints.gridy += 1;
    }

    protected void fillDefaultValues() {
        String javaPath = this.editor.getProfile().getJavaPath();
        if (javaPath != null) {
            this.javaPathCustom.setSelected(true);
            this.javaPathField.setText(javaPath);
        } else {
            this.javaPathCustom.setSelected(false);
            this.javaPathField.setText(OperatingSystem.getCurrentPlatform().getJavaDir());
        }
        updateJavaPathState();

        String args = this.editor.getProfile().getJavaArgs();
        if (args != null) {
            this.javaArgsCustom.setSelected(true);
            this.javaArgsField.setText(args);
        } else {
            this.javaArgsCustom.setSelected(false);
            this.javaArgsField.setText("-Xmx1G");
        }
        updateJavaArgsState();
    }

    protected void addEventHandlers() {
        this.javaPathCustom.addItemListener(new ItemListener() {
            public void itemStateChanged(ItemEvent e) {
                ProfileJavaPanel.this.updateJavaPathState();
            }
        });
        this.javaPathField.getDocument().addDocumentListener(new DocumentListener() {
            public void insertUpdate(DocumentEvent e) {
                ProfileJavaPanel.this.updateJavaPath();
            }

            public void removeUpdate(DocumentEvent e) {
                ProfileJavaPanel.this.updateJavaPath();
            }

            public void changedUpdate(DocumentEvent e) {
                ProfileJavaPanel.this.updateJavaPath();
            }
        });
        this.javaArgsCustom.addItemListener(new ItemListener() {
            public void itemStateChanged(ItemEvent e) {
                ProfileJavaPanel.this.updateJavaArgsState();
            }
        });
        this.javaArgsField.getDocument().addDocumentListener(new DocumentListener() {
            public void insertUpdate(DocumentEvent e) {
                ProfileJavaPanel.this.updateJavaArgs();
            }

            public void removeUpdate(DocumentEvent e) {
                ProfileJavaPanel.this.updateJavaArgs();
            }

            public void changedUpdate(DocumentEvent e) {
                ProfileJavaPanel.this.updateJavaArgs();
            }
        });
    }

    private void updateJavaPath() {
        if (this.javaPathCustom.isSelected())
            this.editor.getProfile().setJavaDir(this.javaPathField.getText());
        else
            this.editor.getProfile().setJavaDir(null);
    }

    private void updateJavaPathState() {
        if (this.javaPathCustom.isSelected()) {
            this.javaPathField.setEnabled(true);
            this.editor.getProfile().setJavaDir(this.javaPathField.getText());
        } else {
            this.javaPathField.setEnabled(false);
            this.editor.getProfile().setJavaDir(null);
        }
    }

    private void updateJavaArgs() {
        if (this.javaArgsCustom.isSelected())
            this.editor.getProfile().setJavaArgs(this.javaArgsField.getText());
        else
            this.editor.getProfile().setJavaArgs(null);
    }

    private void updateJavaArgsState() {
        if (this.javaArgsCustom.isSelected()) {
            this.javaArgsField.setEnabled(true);
            this.editor.getProfile().setJavaArgs(this.javaArgsField.getText());
        } else {
            this.javaArgsField.setEnabled(false);
            this.editor.getProfile().setJavaArgs(null);
        }
    }
}